package com.itheima.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.dto.DishDto;
import com.itheima.entity.Dish;
import com.itheima.entity.DishFlavor;
import com.itheima.mapper.DishMapper;
import com.itheima.service.DishFlavorService;
import com.itheima.service.DishService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {

    @Autowired
    private DishFlavorService dishFlavorService;

    /**
     * 添加菜品，同时保存对应的口味数据  需要操作两张表，dish和dish_flavor
     * @param dishDto
     */
    @Override
    @Transactional//事务
    public void saveWithFlavor(DishDto dishDto) {
        //保存菜品的基本信息到菜品表dish
        this.save(dishDto);

        Long dishID = dishDto.getId();//菜品ID
        List<DishFlavor> dishFlavors = dishDto.getFlavors();
        dishFlavors.forEach( e ->{
            e.setDishId(dishID);
        });

        //保存菜品口味数据到菜品口味表dish_flavor
        dishFlavorService.saveBatch(dishDto.getFlavors());
    }

    /**
     * 根据id查询菜品，及其对应的口味信息
     * @param id
     * @return
     */
    @Override
    public DishDto getByIdWithFlavor(Long id) {
        //查询菜品基本信息，从dish表查询
        Dish dish = this.getById(id);
        //查询当前菜品对应的口味信息，从dish_flavor表查询
        LambdaQueryWrapper<DishFlavor> lqw = new LambdaQueryWrapper<>();
        lqw.eq(DishFlavor::getDishId,id);
        List<DishFlavor> flavors = dishFlavorService.list(lqw);

        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish,dishDto);
        dishDto.setFlavors(flavors);


        return dishDto;
    }

    /**
     * 修改菜品信息及其对应的口味信息
     * @param dishDto
     */
    @Override
    @Transactional
    public void updateWithFlavor(DishDto dishDto) {
        //更新dish表基本信息
        this.updateById(dishDto);
        //清理当前菜品对应的口味数据---dish_flavor表的delete操作
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dishDto.getId());
        dishFlavorService.remove(queryWrapper);
        //添加当前提交过来的口味数据---dish_flavor表的insert操作
        List<DishFlavor> dishFlavors = dishDto.getFlavors();

        Long dishID = dishDto.getId();//菜品ID
        dishFlavors.forEach( e ->{
            e.setDishId(dishID);
        });

        dishFlavorService.saveBatch(dishFlavors);
    }
}
